Ahi, AliBäck, JaanaAalto, JuhoRantala, Pekka A IYlivinkka, Ilona A2025-03-242021-03-192021-03-19https://hydatakatalogi-test-24.it.helsinki.fi/handle/123456789/9363The datasets contain data related to: - VOC concentrations from various heights, measured using Proton Transfer Reaction Mass Spectrometry (PTR-MS)   - VOC fluxes, calculated with surface layer profile method   - Relative humidity - Photosynthetically active radiation, and - Temperature  The data in all datasets have been measured in SMEAR II station, Hyytiälä, Southern Finland. A metadata file for each dataset has been provided for more information. Request accessVolatile Organic Compounds; Boreal forestsdataset